I do not have a range finder but would like one someday. I have all my areas marked off and know the distances I shoot at. I know that 33 of my hunting boots back to back is exactly ten yards. If I go to a new area I just step them off and mark a few spots real quick before I set down on the ground to hunt. I think it would be useful if ya lay down a tape and see how many of your boots back to back equal 10 yards.

I think me and Dan are on the same page on this but I too have never had a problem hunting up in a tree and having my POI changing. I have to go out to the in-laws barn and it is within one foot of my ladder stand hight and I practice off of that and I hit the same as I do off the ground.